Alright, let's work through 80432347 times 12378841 step by step
80432347 × 12378841 = 12378841 × (80432347)
+ 12378841 × 7 producing 86651887
+ 12378841 × 40 which equals 495153640
+ 12378841 × 300 that results in 3713652300
+ 12378841 × 2000 giving us 24757682000
+ 12378841 × 30000 yielding 371365230000
+ 12378841 × 400000 which equals 4951536400000
+ 12378841 × 0000000 yielding 0
+ 12378841 × 80000000 yielding 990307280000000

= 995659234769827
